Home / 3,969.12-5,477.76-2,200.80

Finding the Fourth Proportional to 3,969.12, 5,477.76 and 2,200.80

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Solution

The fourth proportional to 3,969.12, 5,477.76 and 2,200.80 is: 3,037.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969.12 : 5,477.76 = 2,200.80 : x
  2. Step 2: Convert to fraction form
    3,969.12/5,477.76 = 2,200.80/x
  3. Step 3: Cross multiply
    3,969.12x = 5,477.76 × 2,200.80
  4. Step 4: Simplify right side
    3,969.12x = 12,055,454.21
  5. Step 5: Solve for x
    x = 12,055,454.21/3,969.12
  6. Step 6: Final answer
    x = 3,037.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.